In his latest State of the Union address to Congress, US President Donald Trump spoke of Iran's 'sinister nuclear ambitions'

In his latest State of the Union address to Congress, US President Donald Trump spoke of Iran's 'sinister nuclear ambitions'

US President Donald Trump appears to be leaning toward strikes on Iran, but his administration is sending contradictory signals, alternating between threats and a willingness to talk -- and muddying its justification for intervention.

Opposition Democrats are meanwhile questioning the Republican president's objectives, demanding that Congress be consulted before Trump takes the country to war.

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